part of part_of develops from male reproductive system testis genitalia of male organism gonad genitalia of male organism gonada gonad of a male animal, produces and releases sperm. gonad of genitalia of male organism gonad of male genitalia gonad of male genitals gonad of male organism genitalia gonad of male organism reproductive system gonad of male reproductive system gonad of reproductive system of male organism gonada of genitalia of male organism gonada of male genitalia gonada of male genitals gonada of male organism genitalia gonada of male organism reproductive system gonada of male reproductive system gonada of reproductive system of male organism male genitalia gonad male genitalia gonada male genitals gonad male gonad male organism genitalia gonad male organism genitalia gonada male organism reproductive system gonad male organism reproductive system gonada male reproductive system gonad male reproductive system gonada orchis reproductive system of male organism gonad reproductive system of male organism gonada testes testicle testiculus gonad male reproductive organ indifferent gonad